GM Service Manual Online
For 1990-2009 cars only

Cause

Correction

Important: Inspect for the proper gear oil levels prior to performing system diagnosis. Refer to Rear Axle Lubricant Level Inspection .

Worn, loose, or damaged axle mount and/or bracket

Repair or replace the axle mount and/or bracket as required.

Incorrect gear oil

Replace with the correct gear oil and friction modifier additive. Refer to Adhesives, Fluids, Lubricants, and Sealers .